KQQvkb

h#5

4k2b/2Q3Q1/8/8/8/8/8/1K6 b - - 0 1

1. Bxg7 Kc2 Kf8 Kd3 Kg8 Ke4 Kh7 Kf5 Kh6 Qh2#

pure model ideal self-block nocheck

Note: the solution begins with a capture.

h#5

8/8/8/7Q/6k1/4Q3/8/K2b4 b - - 0 1

1. Kxh5 Kb2 Kg4 Qg5+ Kf3 Kc3 Kf2 Kd3 Ke1 Qg1#

switchback single-piece single-piece:black

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#5

8/8/7k/7Q/8/b5Q1/8/K7 b - - 0 1

1. Kxh5 Qxa3 Kg4 Qa2 Kf3 Kb2 Ke2 Kc3+ Kd1 Qd2#

single-piece single-piece:black

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#4

5k2/5Q2/6b1/8/8/8/8/1QK5 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxf7 Kd2 Kg7 Ke3 Kh6 Kf4 Kh5 Qh1#
2. Bxf7 Kd2 Kg7 Ke3 Kh6 Kf4 Kh5 Qh7#

pure model ideal mirror single-piece single-piece:black nocheck

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#4

4kQ2/8/8/2bQ4/8/8/3K4/8 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxf8 Kd3 Kg7 Ke4 Kh6 Kf5 Kh5 Qh1#
2. Bxf8 Qd8+ Kf7 Ke3 Kg6 Kf4 Kh5 Qg5#

pure model mirror single-piece single-piece:black

Note: the side to move is in check in the diagram; the solution begins with a capture.

h#4

5k2/4Q3/8/2b5/8/8/3K2Q1/8 b - - 0 1

Two solutions, with different first and last moves (2 starts, 2 ends).

1. Kxe7 Ke2 Kf6 Qc6+ Kg5 Kf3 Kh4 Qh6#
2. Bxe7 Qe4 Kg7 Ke3 Kh6 Kf4 Kh5 Qh7#

pure model mirror single-piece single-piece:black

Note: the side to move is in check in the diagram; the solution begins with a capture.